MSUKpension

Question UK state pension - Brexit - Romania UK. I had applied for UK pension but received negative reply as not 10 years contribution. I have over 15 years total contribution Romania - UK and based on Brexit agreement should receive prorated each country pension for years of contribution. Why UK reply was negative? How much to contribute and where for 10 years UK contribution. I had asked many times UK international pension in email and online - but no reply. I called - but long waiting time and waste of money - wasted 25$ and still no person to speak to. Tried to call UK consulate in Toronto but impossible to talk to a person. Why so difficult to get proper answer solution to a UK internatiinsl state pension?